3
ANDERSON GREENWOOD
TYPE 81P DSO PRESSURE RELIEF VALVES
MAINTENANCE INSTRUCTIONS
3 VALVE REPAIR (G, J ORIFICE)
Refer to Figure 2
3.1 Disassembly
3.1.1 Relieve spring tension.
3.1.2 Remove spring bonnet and valve internals.
3.1.3 Separate nozzle from guide by hitting top of spindle on soft surface.
3.2 Repair
3.2.1 Hold spindle by skirt O.D. in soft jaw vise and replace seat.
3.2.2 Examine nozzle and polish seating surface as required. Replace if necessary.
3.3 Assembly
Assemble in reverse order of disassembly. Lubricate the parts listed below with the
lubricant specified. Make sure the nozzle is fully and squarely seated in guide.
Seat detail
FIGURE 2
G, J ORIFICE
Cap
Pressure adjustment screw
Outlet
Nozzle
Spindle
Guide
Drag seal
Seat retainer screw
Bonnet
flange
Spindle seal
Bonnet
Seal
Seat
Seal
Spring washer
Spring
Body
Bonnet retainer ring
Vent
Plug
Seal
Flange bolt
